Step 3 · Choose a topic · Class 9

Computing

Understand data, media, networks and computational ideas.

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Explore → practise → quiz → revise. Earlier topics are recommended preparation; every topic stays open.

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Data transfer timeExplore

Category2 of 2 topics

01Algorithms

Step through bubble sort

Suggested-level exploration

Bubble sort compares neighbouring values and swaps them if they are out of order. Play or step through the actual comparison trace. The highlighted pair is the pair being compared; taller bars mean larger values.

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02Networks

Data transfer time

Suggested-level exploration

Estimate an ideal transfer time from file size and connection speed. Here MB and Mb use decimal units; 1 byte is 8 bits. Real transfers have protocol overhead and changing speeds.

Interactive explainer 3-round quiz

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